Power transmission.



E. WITT.

POWER TRANSMISSION. APPLICATION FILED AUG.24| 1916, RENEWED MAR. I0, |919.

1 ,300, 9 1 O, Patented. Apr. 15, 1919.

2 SHEETS-SHEET I.

WITNESS:

INVENTOR, Edward nfz'i,

A TTORNE Y.

E. WITT.

POWER TRANSMISSION.

APPLIcAnoN man Aufs.24.191e. RENEwED MAR. 10.1919.

Patented Apr. 15,1919.

2 SHEETS-SHEET 2 U TED 'rns EDWARD WITT, OF NEWPORT, NEW HAMPSHIRE.

POWER 'rrmivsivrrssrortA Specification of Letters Patent.

Application led August 24, 1916, Serial No. 116,724. Renewed March l0, 1919. Serial No. 281,815.

may be compensated for when the pulley is contracted or expanded.

The invention is described in conjunction with the accompanying drawings and is set forth in the claims.

In vthe drawings Figure 1 is a sectional view taken vertically through the expansible pulley on the plane of its axis and through the adjustable support therefor, and showing the pulley in driving connection with a fixed shaft of a machine. j

Figs. 2 and 3 are end views, on enlarged scales, of members comprised in thev improved pulley, to be hereinafter more particularly referred to.

Fig. l is a face. view of the expansible pulley as seen with the front half section of its body removed.4 l

Fig. 5 is a perspective viewshowing the adjustable support for the pulley.

The body of the pulley comprises separable sections A and B,--the section A having an extended sleeve-like hub A2 by which it is supported on a stud or carrying shaft C therefor.

The section A of the body of the pulley is made onA its face, opposite the sleeve hub A2`with concentric outer and inner anges a and b. f l

These flanges have guide recesses@ and d formed therein in radial lines and in uniformly spaced arrangement around the circular section A. I Y

The said section A has bosses e cast on its face between the radial lines of arrangement of the guide recesses c and d, which bosses are provided with screwthreaded holes f.

Y. The second section B of the pulley body Vis offlat annular form correspondingto the section A, and'is matched therewith, but spaced therefrom by the said flanges a and and such section is attached by screws g, the Shanks of which have thread engagements in the aforementioned bosses e. Y

` D D representv a series of rim forming `segments having radial shank members it which are guided, for their sliding movements in the recesses o and d formed in the flanges a and b, lsaid Shanks having space for their occupancy in the comparatively narrow chamber. between the annular sections A and B of the pulley body; and the said Shanks 7L ofthe rim forming segments have the inner ends of all thereof terminated within a circle concentric with the shaft C.

The segments D carried at the outer ends of the shanks h are widened oppositely from the plane of arrangement of the shanks, and are preferably crowned or of convex form to retain the belt on the pulley.

The shank members of the segments are provided withtransversely extended studs z', projected from their rear sides and extending into or through slots 7' in the disk like section A ofthe pulley body, which slots are provided to afford clearance for the free movement of such studs as one with the segments.

Springs 7c le are provided inthe body Vof the pulley for exerting forces on the segments tending to maintain them. in their contracted relations.

` Each spring comprises an intermediate coil or coils 10, and divergent leg members l2 and 13.'

One leg member l2 of each spring engages the outer one a of the concentric flanges whilethe inner 'leg member 13 of the spring engages'the stud i of one of the segment Shanks;

F represents a tapered or substantially conical member which is slidable axially on the shaft C and coacts with the inner end of the segment shanks for causing the expansi'on of the pulley or for permitting of its contraction.

The inner ends of. the segment shanks l1. are beveled as shown in Fig. 1, and the expanding element F instead of being in the form of a true cone has flattened radiating and divergent surfaces m m as indicated in Fig. 3.

Therefore, mounted to rotate' freely-on thecshaft, will cause through the ,engagement of its segwhile the pulley, usuallyr ment shanks with lthe cone, lthe concurrent rotation of the latter as-is regarded Yas a desirable capability in this pulley.

The cone is inwardly forced 'by the nut G which has a threaded engagement -on the extremity of the shaft; but such screw threaded extremity is formedwith a spline groove 0, and a colla-r p is interposed 'be'- tween the nut and the outer end of the cone which is non-rotative relatively to the latter Iby reason of thcengagement of the feather or spline Q thereof in the splinefgroove .0 in the shaft.-

In order to .afford the expansion' pulley with a :trough like rim within which the ibelt may run the flat .annular sections A and B of the body have oppositely extended circumferential rim-like portions 7' provided .at their outer corners withy parallel or substantially paralleloutwardly extending` flanges s in planes at right angles to the axis of the pulley.

The -expansible pulley is represented as having a driving 4connection with the' shaft X which is understood as mounted for rotationy in an invariable line. This shaft, for instance, may be one comprised in a textile machine, the same having a spur gear wheel L thereon driven' by a pinion M on the hub A2 of the pulley.

. The pinion is in many cases interchangeable and to be replaced by one of greater or less diameter as occasion may require.

The expansilole pulley must necessari-ly be bodily adjustable in accordance with its expansions or contractions -as well also as with the interchanging of the gear-wheel M; and, therefore, the supporting means for the pulley are provided as followsc-l- Y N represents a support having a sleeve or a collar fat its upper end to embrace the shaft for suspension therefrom of such support. This support has associated therewith a longitudinally distensible` bar-like member N2, the same being provided with a longitudinal slot engaged through which is the vclamping bolt u having the confining nut u2. P represents a substantially horizontal bracket adapted for attachment tothe frame ofthe same machine of which the shaft X is a part, which is provided with an arcuate slot/v generated from the axis of the shaft X from which the distensible support M is hung.

The pulley supporting shaft or stud C is supported by the distensible membernN2. 'Said member N2 passes transversely of and in facewise rela-tion to the intermediate portion of the bracket and its proximate portion as to its vertical slot fw. represents a headed clamping bolt, the

- shank of which passes through the arcuate slot, and the vslot `w, and has theflever nut g/ :for bin-ding the parts N2 and P firmly to*- gether'in their properly adjusted relations;

vj ustment, the supporting member N 'has a slot ,t2 as well as .the slot t in the member l 2.

The member N2 has opposite edge ianges e ,e to form an intermediate longitudinal channel so that the parts N and N2 willbe maintained at all times in longitudinal alinement.

Thel provision of the vertical slots in the extensible bar-like members N and N2 inl conjunction withv the arc shaped slot in the bracket and the means for clam-ping the respective parts in their desi-red relations also renders the mounting of the support on :dif-

ferent Amachinesr or in different situations a matter :of entire convenience.

I claim 1. A shaft and a pulley body mounted thereon, said body .comprising a flat annular section having concentric outer and inner iiange's provided with guilde recesses in radial lines, and a second 'flat annular section spaced from the first 4section by said flanges, and means for detachably uniting their-two sections,- riniforming A segments having shank members sl'ida'bly guid-edin the said springs exciting inward forces on :tlre' segmentshanks, a conical member slidable axially on the shaft and having an expanding coaction with the inner ends of the segment Shanks', and a nut screwingl on the shaft and adapted to exert endwise forcing action to the cone.- Y

2. A shaft and a p ul ley body mounted thereon, said body comprisingla flat annular section having concentric outer and inner flanges provided with guide recesses` in radial li nes, and `-a second flat annular section spaced from the first section by said flanges, and means for detachably unitingthe two sections, and said flat annular sections having oppositely extended circumferential rim-like portions, provided'-with flanges parallel to each other and in planes atl right'anlgles to the pulley axis, segments to form" an expans'ible rim in the pulley between said parallel flanges having shank members slidably guided in the said recesses in the '.a'f-.oremen-V tioned flanges', springs exerting v.inward forces on the segment Shanks, a-conical member slidable axially ontheshaftand co-'acting withthe inner lends 'of the'eegrnent v recesses in the aforeilnentioned flanges,

iso

shanks, and a nut screwing on the shaft and adapted to exert an endwise forcing action to the cone.

3. A shaft and a pulley body mounted thereon, said body comprising a flat annular section having concentric outer and inner flanges provided with guide recesses in radial lines, and having bosses provided with screw threaded holes, between the radial lines of arrangement of the recesses, and a second flat annular section spaced from the first section by said anges, and screws engaged in said bosses for detachably uniting the two sections, rim forming segments having shank members slidably guided in the said recesses in the aforementioned flanges, and provided with transversely projecting studs, springs comprising an intermediate coil to be engaged around said bosses, and divergent leg mem bers, one thereof of each spring engaging the outer one of the concentric lianges and the said inner one engaging the stud of one of the segment Shanks, a conical member slidable axially on the shaft and coacting with the inner ends of the segment Shanks, and a nut screwing on the shaft and adapted to exert an endwise forcing action to the cone.

4. A shaft and a pulley body mounted thereon, said body comprising a flat annular section having concentric outer and inner flanges provided with guide recesses in radial lines, and having protruding bosses provided with threaded holes, and a second flat annular section spaced from the first section by said flanges, and screws engaged in said bosses and with said second section for detachably uniting the two sections, and said fiat annular sections having oppositely extended circumferential rim-like portions, provided at ltheir outer edges with flanges parallel to each other-and in planes at right angles to the pulley axis, segments to form an expansible rim in the pulley between said parallel flanges having shank members slidably guided in the said recesses in the aforementioned concentric flanges, and provided with transversely extended studs, a series of springs, each comprising a coiled intermediate portion to be engaged around said bosses, and divergent leg members, one of which engages the other one of the concentric flanges while the inner one engages the stud of one of the segment shanks for inward forces thereagainst, a conical member slidable axially on the shaft and coacting with the inner ends of the segment Shanks, and a nut screwing on the shaft and adapted to exert an endwise forcing action on the cone.

5. The combination with the shaft of a machine, of a support hung from said shaft, an expansible pulley mounted on said support, and driving connections between said pulley and the shaft, and a bracket adapted for attachment to the frame of the machine provided with a slot having the form of an arc generated from the axis of the shaft, a clamping bolt, engaging said bracket, extending through the slot therein, and through said support, and a clamping nut screw engaging on the shank of said bolt.

6. The combination with the shaft of a machine, having a driving gearwheel thereon, of a support, hung from said shaft, and comprising a longitudinally distensible barlike member, a shaft mounted on said distensible support and provided with an expansible pulley, having an interchangeable pinion in mesh with said gear wheel, and a bracket adapted for attachment to the frame of the machine provided with an arc slot generated from the axis of the first namedshaft, a clamping bolt engaging said bracket extending through the arc slot therein, and through a slot formed longitudinally in an adjacent portion of the distensible bar-like member, and a clamping nut screw engaging on the shank of said bolt.

Signed by me at Springfield, Mass., in presence of two subscribing witnesses.

EDWARD WITT.`

Witnesses:

G. R. DmscoLL, WM. S. BELLows.

Copiesof this patent may be obtained for ve cents each, by addressing the Commissioner o1' Patents,

- Washington, D. G. 

